with an experiment prove that air is necessary for the combustion of any substance?
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Activity: Take a candle and fix it on a table. The candle is lighted. ... After some time, when all the oxygen of air inside the gas jar is used up, then the burning candle gets extinguished. This proves that air is necessary for combustion of substances.
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Take a candle and place on a table. Light it up and cover it with a glass jar. Some time later candle will extinguish;because air is needed to burn an item.
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